Water vapor comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options
1. Both processes cannot happen simultaneously
2. Both processes can happen together because the diffusion coefficient of water and CO₂ is different
3. The above processes happen only during night time
4. One process occurs during day time and the other at night

Which of the following is not required for transpiration?
1. adhesion of water molecules to cellulose.
2. cohesion between water molecules.
3. evaporation of water molecules.
4. active transport through xylem cells.

All the following regarding the cohesion-tension model are true except:
1. Water movement is driven by transpiration.
2. The water potential of atmospheric air is more positive than that for xylem.
3. Cohesion represents the tendency for water molecules to stick together by hydrogen bonds.
4. The physical forces in the capillary-sized xylem cells make it easier to overcome gravity.

Normally, the fastest delivery of water and minerals to the leaves of a tree is most likely to happen on a:
1. cool, dry day
2. warm, dry day
3. warm, humid day
4. very hot, dry, windy day

All the following will be a selective advantage in dry, hot conditions except:
1. CAM pathway
2. reduced leaves with stomata on the lower surface
3. a thick cuticle covering the fleshy leaves
4. mutant unable to produce ABA

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
1. lignified thick walls
2. cohesion and adhesion
3. weak gravitational pull
4. transpiration pull